It's your call.
Pinching out will make the plant bushy which in theory will give you more pods. However, it will also slow down/check the rate of growth, so you're pods will probably take longer to form. Probably swings and roundabouts. If it's really tall and skinny then pinch it out. You've still got loads of summer to come so you have plenty of time to make it into a bigger plant by pinching it out.

Some of us live in the past, always talking about back then. Some of us live in the future, always planning what we are going to do. And, then there are those, who neither look behind or ahead, but just enjoy the moment of right now.